Visually show whether shuffle is active or not

[tavareshenrique]

I do not know if it is a bug or if the initial idea of the project was not to use this information, so I opened this PR as an "Enhancement request".

I think it's cool to know if the Shuffle option is checked or not, how it works on Spotify:

To find out if Shuffle is active or not in Spicetify theme I have to hover over it and check this information, like this:

Maybe if he looked like this, it would be visually cool:

It's just a suggestion. Congratulations for the great job, I loved it. 💜

[jpedroschmitz]

Yeah, we should add an active state when the shuffle option is turned on.

@birobirobiro, when you have time, let me know if you can take this issue =D